Magnetic and magnetocaloric properties of Gd melt-spun ribbons

A Svalov,A Larrañaga,A Arkhipov,G Kurlyandskaya,E Kudyukov,S Andreev,D Neznakhin

doi:10.1088/1742-6596/1389/1/012100

A Svalov, A Larrañaga + Show 5 more

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https://doi.org/10.1088/1742-6596/1389/1/012100

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Abstract

Structural features, magnetic properties and magnetocaloric effect of pure Gd ribbons prepared by melt spinning method were carefully analyzed. The X-ray data show that there is no change in the cell parameters for the samples prepared at different copper-wheel speed. Average size of nanocrystalline grains was close to 30 nm. As compared to the bulk Gd sample, the Curie temperature was the same in the case of the ribbons. From the magnetic isotherms, the magnetic entropy change was derived using the Maxwell relation follow the standard procedure. Its value was comparable with the value of the bulk Gd. Good mechanical properties of fabricated Gd ribbon and their flexibility can be useful for design of flexible refrigerating elements.

Highlights

The great interest in the study of the magnetocaloric effect (MCE) is understandable in a view of prediction that refrigerators operating on the basis of magnetocaloric effect will be more energy efficient than modern refrigerators based on compression and expansion of gases
We present a detailed study on the structural peculiarities, magnetic properties and magnetocaloric effect of Gd ribbons prepared in different conditions by melt spinning in a purified argon atmosphere
X-ray diffraction (XRD) experimental data were in good agreement meanly with a Gadolinium hexagonal structure (04-019-0727 data base file), the positions at 28.73o and 31.09o in 2θ for the intense reflections (100) and (002) respectively were used to calculate the starting unit cell parameters 3.585 Å and 5.750 Å, for “a” and “c” parameters, respectively

Summary

Euro-Asian Symposium “Trends in Magnetism”

A Svalov, S Andreev, A Arkhipov, E Kudyukov, D Neznakhin, A Larrañaga and G Kurlyandskaya Ural Federal University, Institute of Natural Sciences and Mathematics, 620002 Ekaterinburg, Russia 2 Universidad del País Vasco (UPV/EHU), Servicios Generales de Investigación, 48940 Bilbao, Spain 3 Universidad del País Vasco (UPV/EHU), Departamento de Electricidad y Electrónica and BCMaterials, 48940 Bilbao, Spain

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